Showing Spotlights 9 - 16 of 2445 in category All (newest first):
Negative differential resistance (NDR), which describes a decrease in electrical current as the applied bias increases, has always been one of the hottest topics in solid-state electronic devices since L. Esaki first demonstrated this phenomenon in heavily-doped Ge p-n junctions in 1958. Researchers now report the modulation of a unique room-temperature NDR effect with high peak current in ambipolar black phosphorus transistors. The simplicity of this structure, combined with the recent progress in scalable production of BP films, makes the BP NDR devices promising for practical electronic applications.
Aug 10th, 2021
Lithium-sulfur (Li-S) batteries are a promising alternative to lithium-ion batteries because - at least theoretically - they can render 3-6 times higher energy density. In developing Li-S battery technology, researchers have borrowed many components from the mature lithium-ion battery, such as the separator. However, because the working mechanism of Li-S cells is fundamentally different, there is a need for a suitable separator specifically designed for Li-S. Re-engineering the separator can improve the energy density of Li-S batteries.
Aug 5th, 2021
The bottleneck in atomic-scale data storage area may be broken by a simple technique, thanks to recent innovative studies. Through a simple, efficient and low-cost technique involving the focused laser beam and ozone treatment, researchers can manipulate the properties of nanomaterials, thereby 'writing' information onto monolayer materials. The result is a demonstration of the thinnest light disk with rewritable data storage and encryption functionalities at the atomic level.
Jul 28th, 2021
Scientists have discovered a new class of material which, when fractured, can repair themselves within milliseconds. The highly crystalline materials, when broken into pieces, can self-propel and re-join in the blink of an eye, and repair themselves so precisely that they become indistinguishable from the undisturbed materials. These new materials may find applications in various high-tech applications. During repair, fractured pieces travel with a honeybee wing-like motion with acceleration comparable to cars.
Jul 26th, 2021
Heat dissipation has increasingly become a bottleneck for modern electronics. In particular, the development of wide bandgap semiconductor devices has led to many advancements of high power and high frequency electronics Scientists now have integrated new super thermal conductors - boron arsenide and boron phosphide that they developed recently - as a thermal substrate for power electronics devices such as gallium nitride high electron-mobility transistors. The study demonstrates high cooling performance better than the best state-of-the-art technologies.
Jul 9th, 2021
Self-charging biosupercapacitors (BSCs) that can store energy and be self-charged via chemical or solar energy conversion through bioreaction have recently attracted considerable attention. As human sweat also contains a high concentration of lactate biofuel, the harvesting and storage of the bioenergy in sweat holds the potential to provide the power for wearable electronics. A new wearable hybrid device functions as both a biofuel cell and a supercapacitor.
Jul 8th, 2021
Scientists have used metal carbides as the carrier to support the transition metal Fe and Ni atoms to engineer single-atom oxygen evolution catalysts for the first time. Distinct from previous studies, this novel metal carbide support shows obvious advantages for supporting different single atoms, especially its non-strong bonding features, which resulted in high mobility of the supported atoms, which might be the key point for realizing excellent OER activities.
Jul 2nd, 2021
Researchers report an in vitro and in vivo proof-of-concept for the capacity of triboelectric nanogenerator (TENG) technology to function as a simple, scalable, inexpensive, and self-powered device for tactile sensory restoration. This integrated tactile sensory restoration device powers itself and is suitable for implantation. It bypasses damaged nerves and activate sensory neurons at various levels of electrical potential, generated by different levels of tactile pressure on the implanted device.
Jul 1st, 2021